There's Landsat data, that requires a bit of processing, and some low-res Blue Marble GeoTIFFs. For very small subsets, we're also really interested in kite map

There's Landsat data, that requires a bit of processing, and some low-res Blue Marble GeoTIFFs. For very small subsets, we're also really interested in kite mapping by grassrootsmapping: http://grassrootsmapping.org http://grassrootsmapping.org